240mm2 power cable
(Including common cable, flame retardant cable, fire resistance cable and low smoke, halogen free, flame retardant cable)
Application
(1)Rated voltage Uo/U is 0.6/1 kilovolts.
(2)Maximum rated temperature of cable conductor is 90°C.
(3)Maximum conductor temperature is lower than 250°C when cable is shorted for less than 5 seconds.
(4)Ambient temperature is not lower than 0°C and its minimum bending radius is as follows when cable is installed.
Key Technical Parameter
Calculation condition of ampacity
-ambient temperature is 25°C (underground),40°C(air).
-conductor working temperature is 90°C
-soil heat resistance coefficient is 1.0°C·m/W, but not consider its rise resulted from water migration when it operates continuously.
-gap between axis of cable and surface of around is 700millimeter when it is laid in earth.
-for many cable being laid in parallel. gap of axis of cables is 2 times O.D.
20170208
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